• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Temperature Sensor 1 Signal | P0A9D | P0A9E | P0A9E | -- |
Temperature Sensor 1 Low Reference | -- | P0A9E | -- | -- |
Temperature Sensor 2 Signal | P0AC7 | P0AC8 | P0AC8 | -- |
Temperature Sensor 2 Low Reference | -- | P0AC8 | -- | -- |
Temperature Sensor 3 Signal | P0ACC | P0ACD | P0ACD | -- |
Temperature Sensor 3 Low Reference | -- | P0ACD | -- | -- |
Temperature Sensor 4 Signal | P0AEA | P0AEB | P0AEB | -- |
Temperature Sensor 4 Low Reference | -- | P0AEB | -- | -- |
Circuit | Short to Ground | Open | Short to Voltage |
---|---|---|---|
Operating Conditions: Ignition ON Parameter Normal Range: 26°C (79°F) | |||
Signal | 100°C (212°F) | -40°C (-40°F) | -40°C (-40°F) |
Low Reference | -- | -40°C (-40°F) | -- |
Circuit | Short to Ground | Open | Short to Voltage |
---|---|---|---|
Operating Conditions: Ignition ON Parameter Normal Range: 3.2 Volts | |||
Signal | 0 Volts | 4.75 Volts | 5 Volts |
Low Reference | -- | -40°C (-40°F) | -- |
The drive motor generator battery has four hybrid battery temperature sensors. The hybrid battery temperature sensors are located on the top of the hybrid batteries. The temperature sensor is a variable resistor that measures the temperature of the hybrid batteries. The control module supplies 5 V to the signal circuit and a ground for the low reference circuit. The hybrid battery temperature sensor resistance changes with battery temperature. The lower the temperature, the higher the resistance of the sensor. The higher the temperature, the lower the resistance of the sensor. The drive motor generator battery control module (GBCM) uses the battery temperature sensors to determine the hybrid battery temperature to control the battery cooling fan operation.
• | The ignition is ON. |
• | The 12 V battery voltage is 9-18 V. |
The hybrid battery temperature sensor is in normal operating range, but is 15°C (27°F) different from the other 3 sensors.
The hybrid battery temperature is greater than 95°C (203°F) and one other temperature sensor is less than 70°C (158°F).
The hybrid battery temperature is less than -40°C (-40°F).
• | If two sensors fail, the drive motor generator battery sends a message to the HPCM to reduce the power use limit to 50 percent and the battery vent fan will default to run. |
• | If all four sensors fail, the state of charge (SOC) will be considered invalid. |
DTCs P0A9C, P0A9D, P0A9E, P0AC6, P0AC7, P0AC8, P0ACB, P0ACC, P0ACD, P0AE9, P0AEB, and P0AEA are type B DTCs.
Hybrid Energy Storage Schematics
Drive Motor Generator Battery Cooling Description
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
EL-48900 HEV Safety Kit
⇒ | If any of the specified DTCs are set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle. |
Danger: Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
• Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors • Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors - Visually and functionally inspect the gloves before use. - Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or not.
• | Obstructed inlet or outlet duct |
• | Damaged fan blades |
• | Missing or damaged internal foam seals |
⇒ | If any of the conditions are present, repair or replace any damaged components. |
• | Terminal 2 |
• | Terminal 4 |
• | Terminal 6 |
• | Terminal 8 |
⇒ | If greater than the specified range, test the GBCM ground circuits for an open/high resistance. If the circuits test normal, replace the GBCM. |
⇒ | If greater than the specified value, replace the GBCM. |
• | Terminal 1, for temperature sensor 1 |
• | Terminal 3, for temperature sensor 2 |
• | Terminal 5, for temperature sensor 3 |
• | Terminal 7, for temperature sensor 4 |
⇒ | If less than the specified value, replace the GBCM. |
Danger: Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
• Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors • Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors - Visually and functionally inspect the gloves before use. - Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or not.
⇒ | If greater than 500 Ω, replace the drive motor battery sensor module wiring harness assembly. |
Perform the Diagnostic Repair Verification after completing the repair.
• | Control Module References - for drive motor generator battery control module replacement, setup and programming. |